EDTA滴定法测定镁-锌-钇三元合金成分  

Determination of components in magnesium-zinc-yttrium ternary alloy by EDTA titrimetry

作　　者：胡珊玲[1] 宋瑞平[1] 林燕[1] 魏友利[1] 

机构地区：[1]赣南师范学院化学与生命科学学院,江西赣州341000

出　　处：《冶金分析》2010年第4期69-72,共4页Metallurgical Analysis

基　　金：江西省科技厅重点项目<高强耐热稀土镁合金研制>基金资助

摘　　要：研究了采用EDTA络合滴定法连续快速测定镁-锌-钇三元合金中各主体成分的方法。控制溶液pH值为5.0~5.5,先以EDTA滴定镁-锌-钇三元合金中的锌钇合量,再在pH值为9.0~9.4时,通过氨水沉淀分离钇后滴定锌的含量,滴定时加入三乙醇铵掩蔽主要干扰元素铁。采用所确定的分析方法对多种组分的三元合金样品进行测定,Zn∶Y∶Mg=3∶1∶96时RSD小于3%,Zn∶Y∶Mg=6∶3∶91时RSD小于2%,标准加入回收率在98%~100%范围内。The determination method of components in magnesium-zinc-yttrium ternary alloy was studied by EDTA titrimetry.The content of（Zn＋Y） was determined firstly at pH 5.0-5.5.Then,the content of Zn was measured after separating yttrium by ammonia at pH 9.0-9.4.During the titrimetry,triethanolamine was added to mask the interference from iron.The proposed method was applied to the determination of ternary alloy with several components.When the ratio was Zn∶Y∶Mg =3∶1∶96,the relative standard deviation（RSD） was smaller than 3 %.When the ratio was Zn∶Y∶Mg =6∶3∶91,the RSD was smaller than 2 %.The standard addition recoveries were 98 %-100 %.

关 键 词：EDTA滴定法 镁-锌-钇三元合金 锌 钇 测定 

分 类 号：TG115.31[金属学及工艺—物理冶金]